Fudayl ibn `Iyyaad (rahimahullaah) said:
“Any evil doer can think he is a good person, the ignorant can think of himself as a scholar, the greedy thinks of himself generous, the stupid thinks of himself as intelligent. Life is short and hopes are unlimited, yet many are too dazzled with themselves to see a clear picture for advancement.”
Adh-Dhahabee (rahimahullaah) commented: “I swear by Allah that Fudayl is right. One is also unjust, yet believes he is the oppressed, eats unlawfully and thinks himself pious, a sinner and thinks himself honest, and seeks knowledge but hasn’t even learned to implement it to his family.” Sifaatus-Sawfah 8/440.